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2 marksQualitative Analysis

CSEC Chemistry · May/June 2006 · Paper 2 · Question 5(a)(iii)

A student produces ammonia in the laboratory by adding Liquid Y to Solid W and warming as shown in Figure 5. Damp blue litmus is used to identify the ammonia produced.

Comment on the suitability of using the moist blue litmus paper to identify ammonia gas.

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Other parts of this question

  1. 5(a)(i)Suggest ONE suitable reagent that can be used as Y and ONE as W for the experiment.[2 marks]
  2. 5(a)(ii)Identify the process by which the ammonia gas that is produced at the bottom of the test tube comes in contact with the litmus paper at the mouth of the test…[1 mark]
  3. 5(a)(iv)Instead of the litmus test used above, describe ONE OTHER chemical test that can be used to identify ammonia gas. Write a balanced equation to represent the…[4 marks]
  4. 5(b)(i)Name the catalyst used in the Haber process.[1 mark]
  5. 5(b)(ii)Explain the importance of using relatively high pressure in this process.[2 marks]
  6. 5(b)(iii)Draw a fully labelled energy profile diagram of the reaction for the production of ammonia during the Haber process. You should name the reactants and products…[3 marks]

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